I just set it up today. The docker setup was pretty easy and I got the telegram and WhatsApp bridge running so I have all my messages in one place. Signal bridge is next.
I was looking at setting up one for the same reason, to have most of not all of my chat apps in the same place but I was only finding docs for the docker-ansible setup which isn't really what I want. Can you share your docker-compose file or the docs you used to get everything setup?
Let me know if you have anymore questions. It's running on a small host with 40 docker containers running in parallel and the cpu sits idle at 5% so it's not much of a drain.